In BZPStuck, the Predacons were the band that Andrew and his roommate were in back in back in college. The band was first mentioned in this page. All that's really been revealed so far is that Andrew played guitar, his roommate played bass, and that something unfortunate happened that split the band apart and drove a wedge between Andrew and his roommate.

That's all that's been shown so far, and Andrew + his roomie are the only members whose identities have been revealed so far...but keep watching.

(Fun fact, they're based on my actual college band, which indeed was called the Predacons)

Anyway there's a glaring continuity error in this, in that Andrew Arthur explicitly plays a Telecaster in the comic! But what can you expect from fan art, anyway